[Delvorak]

I've had the same thing occur, although only with a few texts, not dozens. Without fail, it's because somehow they got stuck in the outbox, but didn't send originally. When they were backed up and then restored on the new rom (I used Pimbackup), then windows apparently decided that it should try to send them again. I assume that this is because it thinks they are "new" texts now.

I just make sure that i don't restore the outbox when I restore my text messages from a backup. If I'm thinking ahead, I make sure that the outbox doesn't get backed up, or that I go in and deleted everything out of it before backing up. That fixes the issue for me.